HHH syndrome is due to deficiency of which enzyme?

Ans. is. c' i.e., Ornithine transcarbomylase Actually there is no molecular deficiency of any enzyme but functional deficiency.In HHH syndrome there is deficiency/defect in Ornithine transpoer across the mitochondrial membrane which causes functional deficiency of :?Ornithine transcarbomylaseOrnithine -8- aminotrans ferase (OAT)